12 volt LED light bar on 24 Volt printer

Macgyver

The question I am throwing out is, My 3D printer is Dark, I found a 12 Volt LED light strip that I was hoping to use inside the case of my printer.

My concern is this Can I use a 12 Volt light strip (it's the small stick-on strips you can get from Home depot) from a PWM if I run it at 50% ?

Here is my configuration, I have not plugged anything in yet as I do not want to blow a board just doing a sanity check. Or is there another way I should do it?

Config.g
M950 F2 C"duex.fan7" Q500 ; create LED on pin fan2 and set its frequency
M106 P2 S0 H-1 ; Disable fan channel for LED

LED on macro
M300 S1222 P444 ;Audible Beep
M106 P2 S128 ;Turn on P2 @ 50% (12 Volt LED at 100%)

M300 S1111 P444 ;Audible Beep
M106 P2 S0 :Turn off P2 (LED off)

Phaedrux

Use a buck converter to drop the voltage similar to how you would for a 12v fan.

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Fans_connecting#duet-2-using-12v-fans-when-vin-is-24v

Macgyver

HI @Phaedrux

Thanks for the info, that's why I wanted to do a sanity check first. Sooner ask now than blow it up.